Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/5/84; site osu-eddie.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!houxm!ihnp4!cbosgd!osu-eddie!pritch
From: pritch@osu-eddie.UUCP (Norman Pritchett)
Newsgroups: net.micro.mac,net.micro
Subject: Re: Re: Amiga vs Mac
Message-ID: <567@osu-eddie.UUCP>
Date: Wed, 28-Aug-85 09:48:11 EDT
Article-I.D.: osu-eddi.567
Posted: Wed Aug 28 09:48:11 1985
Date-Received: Sat, 31-Aug-85 08:42:19 EDT
References: <8883@ritcv.UUCP> <26700024@inmet.UUCP> <3241@topaz.RUTGERS.EDU> <2643@amdcad.UUCP> <194@ittral.UUCP>
Organization: Ohio State Univ., CIS Dept., Cols, Oh.
Lines: 32
Xref: watmath net.micro.mac:2528 net.micro:11762

> Now, back to the Amiga vs. ST business. Does the ST really have an
> external bus? I mean like Address/Data and all that good stuff? Or
> does it depend entirely upon the DMA channels for this? I know the
> Amiga has everything but the kitchen sink coming out the side, and I'd
> rather have that than just a DMA connector. Anybody know? Also, is
> anybody besides me interested in getting OS9/68K running on the Amiga?
> Somebody's bound to have thought of it by now.
> 
> Doug Hall
> ITT Telecom, Raleigh NC
> decvax!ittatc!ittral!hall

I'm interested in knowing if anybody has the intention of putting os9 on the
Amiga too (I personally wouldn't mind trying a crack at it myself).  I was
just reading about AMDs new disk controller chip set and started getting
some neat ideas for disk-sharing between several os9 machines.

The chip is the Am9580 hard disk controller.  The name is misleading because
it can actually control a mixture of four hard AND floppy disk drives.
Instructions to the controller are stored in the host's memory in
linked-list control blocks which are DMA'd by the 9580.  The controller can
handle a 32-bit linear address space (but lets face it, how many systems
have 4Gbytes of real memory?) so what if you use the top couple of bits in
the address to select a host? ...

-- 
-----------------------------------
Norm Pritchett
UUCP:   cbosgd!osu-eddie!pritch		P.O. Box 3393
CSNET:  pritch@ohio-state		Columbus OH 43210
BITNET: TS1703 at OHSTVMA
Bellnet: (614) 422-0885